* Use Finder to locate the Mac OS X Lion installer, right-click and select "Show Package Contents"
* Find the SharedSupport folder and look for a file names "InstallESD.dmg". This is the Lion Boot Disc image.
* Copy the "InstallESD.dmg" file to another folder such as your desktop.
* Launch Disk Utility and click the burn button
* Select the "InstallESD.dmg" copy as the image to burn, insert a DVD, and in a few minutes you will have a brand new Lion Boot Disc.